Can we disturb the concert?

Gogol Bordello did a great show in Cvetlicarna last friday. I came in quite late as other work had to be done. The hall was already packed full and i could quickly notice a lots, and i mean, lots of photographers in the first rows. As this is a club show, there is no space between the stage and crowd and this means, especially in a show where everyone in the crods jumps all over, pretty hard work to get a picture. I was able to get in front of the fence, there was a space just next to the stage for one or two photographers, and observe the happening a bit from the side. The action on stage was amazing, the band really did a great performance and pictures are very energetic. But the point of this post is to ask a question. What is the limit of our work, how long can we take pictures in front of stage and push the cameras into musicians and flash them. I completely understand this gives good pictures and all, and i do it all the time in club gigs, sometimes this is the only way to catch the energy there. But there is a limit, there are people who paid for the ticket and would like to see the show, see the musicians faces, and on the other hand there are musicians who can get distracted by this, some will tell you that, some will not but they might complain to the local organizers and sometimes this is not so good. Below are some images of what has been happening on friday, captured intentionally to show the photo action in first rows. I know musicians, organizers and photographers might read this and it would be nice to hear from you and see what is your opinion.