I see nothing rude with a polite request as they are setting it up (esp if you were there first), something along the lines of "Oh, I'm sorry to bother you but could you set that up further down please, it's blocking my view?". If that doesn't work then I bring out my boom box with some nice heavy metal music with lots of cuss words etc playing really loud until they decide to move on <img src="http://www.traveltalkonline.com/forums/images/graemlins/Groovin.gif" alt="" /> and may be walk past their set up quickly in some flip flops a few times to really get the sand going, you know to "rinse off" some stuff 1 thing at a time, get my feet/legs wet etc.... (sorry guess I'm in a bit of a snarky mood this morning....)