Does Source sometimes slow you down from taking inappropriate action?

Yes, I've had this happen a lot especially if I've fallen into the trap of trying too hard to make something happen with non-inspired physical action instead of following what feels good in the moment.

Quite often, I'll look back on something that I've been trying to unsuccessfully "force" into place through that kind of action and notice that it would have been a disaster if I had managed to get my way at that time in that way. The physical "obstacles" that prevented me getting my way proved to be working to my benefit.

There's a little trick I use (which I stole from one of Dr Robert Anthony's courses) whereby if I try three times unsuccessfully to make something happen physically, and it doesn't, I'll take that as a direct sign from Source that I should drop that particular course of action for now. There's a "request" in my Manifesting Box indicating that I will interpret that signal in that way.

What's really happening here is just the vibrational matching ability of the Law of Attraction...

If you are vibrationally "in-tune" with getting something you want then you'll be "out-of-tune" with courses of action that won't lead you to it, so when you try to take those courses of action, they just don't seem to work out.

You can, of course, eventually brute-force your way (because we live in a physical-law-dominant world) into doing something physically that leads to a disaster but I've noticed there are always lots of "warning signs" (emotional and physical) that something is not right.

As long as one stays reasonably aligned (i.e. generally feeling good on a day-to-day basis), the "warning signs" are plentiful and very clear.

Just a point of clarification: One only interprets Source as giving "warnings" (in the literal sense) instead of "inspirations", when one is predominantly lower down the emotional scale: How can you identify if your actions are inspired from the universe or not?

If you believe in a "source", I don't myself, too much evidence for me that if there is a "source" it doesn't get involved in human affairs. There's just no reconciling the fact that if it's to your advantage, "source" is cool, but if it's not, "source" is unfair. I don't want "source" taking away my power of choice, or manipulating events in my life. To me, again, I just see no way that "source" could be involved in anything relating to human affairs. Too many people involved, and everything affects everything else, so any way that some benevolent "source" could benefit you could be a detriment to someone else. Sorry, I just think that it's arrogant of us to think that "source" could care enough about us as individuals to change events in our lives when it could negatively affect someone else. It's like a kid praying all year that it doesn't rain when he gets to go to Disneyworld. Then it does rain, but there is a drought going on, so someone is gonna be disappointed. The Kid or the farmers. Football players who point to the sky and do their worship thing, like "source" showed them some personal favor in allowing them to score a touchdown, really? No, if you take a closer look, look at rationally, you may see that it's a fantasy to believe that "source" would get involved in human affairs. It just doesn't stand the test of reason, and if it is true, then "source" is some kind of a--hole for taking away people's power of choice. To me, bottom line is that if I believe in some benevolent source, I WILL END UP DISAPPOINTED, more often than not.