I don't mind so much in a tournament, or I should say an MTT, as the chances of two players from whatever country ending up at the same table just so they can cheat are so slim. On the other hand, when it comes to cash games, I won't tolerate it. I've seen too much silliness to rule anything out. I used to hear rumors of a group of guys that used to skype during tournaments to try to gain an advantage over there opponents on a membership site where every tournament is a freeroll. For straight up cash, there is no telling what people will do.
We have seen from past cheating scandals the lengths that some will go to in order to gain an advantage. Back when I was playing $10NL cash games, I used to notice two players that were always at the same table. I've said before that when you're multi-tabling, it's not uncommon to notice several of the same players at different tables. But I found it odd that I never saw one of these players without the other. For instance, you would never see them join a table unless there were at least two open seats. Then they would join the table within seconds of each other. When one left, the other would leave. I thought it was suspicious, so I wouldn't play at tables that they were at. If I was at a table and they sat, I would leave the table.
I'm not saying there are groups of Eastern Europeans conspiring to take over the world by conquering the micros. But nowadays I'm usually going back and forth between $200NL and $400NL games. Being able to string together winning sessions at those stakes can't start to add up. So too can the losses. For that reason I don't take any chances. For those stakes I won't put anything past anyone. I don't multi-table. I play one table at a time and focus on everything. If I see anything suspicious, I will usually leave and take a break and change stakes when I return. If I see any foreign language, I put it into a translator immediately. I used to do it just out of curiosity when it happened it tourneys. But again, for the stakes that I usually play at, I'm not taking chances. It's usually a one way conversation from someone complaining about a beat. Every once in a while, one player will say something and another may reply. But if I see any prolonged conversation and I will report it and leave the table.