And why would that be any different from some people dancing with a huge portrait of Ronald Reagan at the Republican National Convention?
And no, I do not think that is reprentative of all or even the majority of Lubavitchers at all. However, it gives the wrong impression.
Not to mention at the Israeli Independence Festival up in Encino this year, there was a small plane towing a banner with Rebbe Schneerson's pic on it with 'moshiach' written on it.
If you don't want people to think you are worshipping a rebbe, then don't do things publicly to make people think you are.