Uh...it sounds like a crappy existence if you are able to be arrested anywhere, anytime. Even more so when you attract attention, as most of the time people only leave adventurers alone because they're doing a job for them, or they just aren't worth paying attention to.
Crappy in real life, great for roleplaying. Unlike a normal adventurer who can get away with being ignored a Yeoman will HAVE to be doing jobs for other nobles and be valuable to them unless he wants to suffer the wrath of some jealous knights.
