The 39-year-old actor thought he was used to the coverage location shoots get from snappers until he teamed up with Aniston in 'The Bounty', when the paparazzi blocked shots and forced them to re-take, reported Daily Express.
"Unfortunately for poor Jennifer, this roadshow comes out all the time, and then of course there were all the rumours about her and I dating, just because we're doing a movie together, which brought out even more paparazzi," the actor said.
"A lot of the paparazzi are really good people but some of them are a nightmare. They go out of their way to disrupt filming and it's really sad because you're there with a crew of 200 just trying to make a living. You're there for 16 hours a day and you have these guys who don't care if they're standing in your shot," Butler added.
The '300' star also said that he was shocked by the way photographers conduct themselves around a outdoor shoot and the liberties they take.
"They'll flash, so the film you just shot is useless. It's unbelievable sometimes what they do and you're thinking, 'This is allowed?' That can be very frustrating," Butler said.