ishman: sorry i guess i missed ur post.
SJSinNYC: If you were stranded alone on an island,
& had ur finest clothes with u Kavod Shabbos would require
u 2 don them on Shabbos.
The point however about neighbors / community,
that is not nogeah here, however it would be in the best interest of any
person in any community to wear clothes similar to his community
1)Not 2 b Oiver Al Tifroish Min Hatzibur.
2)So as to not be an outcast, or looked upon as weird. (bringing hardship on oneself)
3)Not to give shallow judgemental people a Nisayon.
#3 might be up for discussion