BTW, you don't really even need a durso setup for these flow rates....it's fine if one's already installed, but an open standpipe usually works fine.
But there is potential...
That's just life. If you were someone to take that branch of thought seriously, I'd have to recommend another hobby. There are so many things that "can happen". But keep using common sense (e.g. screened drain) and you'll be fine.
The likelihood of blockage is already very low since there usually isn't more than a milimeter or two of water going over the edge....the size of debris that will go over is very limited. Something would have to crawl or float over the rim of the plumbing to have a chance at blocking anything and there's usually a weir system that takes care of that.
We don't have much floating stuff anyway (not that could block a drain), so
if you limit the critters that could crawl up there to ones that are too small to block your drain, then you're set
even if they get past the weir. If you go even further and add a screen, then there's pretty much zero chance of anything happening.
In fact, the only problems I've known to be associated with plain gravity drains is noise and bubble generation. Those problems are almost always from too much flow. I'm sure there's been a blockage problem somewhere in the history of gravity drains, but I haven't run into one.
