Sliwa: LiLo & RiRi Need Guardian Angels

3/17/2009 2:10 PM PDT BY TMZ STAFF
... as in, protection courtesy of the red beret brigade fronted by Curtis Sliwa.

Curtis Sliwa: Click to watch
Sliwa and his unarmed crime fighting group "Guardian Angels" trolled Venice for trouble last night.

As some straight-off-the-boat Irish cornered Curt for autographs, he worried out loud how both Lindsay Lohan and Rihanna need help ... stat.