I apologize if these points have been raised already; I've read only abou 2/3 of the responses here.
1) If, say, the path is N-S, and a road is encountered, isn't the road likely to be E-W? If so, how does a strobe on the N_S axis provide significant visibility? Roads intersecting a MUP ... not a good argument form a strobe on the MUP.
2) IMO, if you want people to notice you on a MUP, why not use a bell? If you use a strobe, you should have enough anecdotal evidence from this thread to conclude that it's painful for a goodly portion of the people you approach - and it's abundantly clear that a strobe inhibits the ability to judge distance. It provides a lot less safety for the strobers than they realize.
3) The next time I encounter some schmuck usinga strobe that bothers me, I think I'll start weaving on the path and perhaps stopping and blocking the path.