[dopidop]

I would be careful getting in and out of Schengen. That would probably work a couple of time. But immigration can refuse it without causes, too.

[keiferski]

Maybe in the future post-COVID it will be more strict, but my experience has been that it isn’t.

[bluGill]

Not being strict makes it harder. You can sometimes get in and out without the proper proof that you actually left (your passport isn't always stamped when you cross the border). Then when you do finally get someone asking questions you can't prove the dates and they won't let you in.