Two players always together - suspicious?

[heyrocker]

Last night I sat down at a $20 + 2 SNG at Paradise and noticed a couple players whose names I recognized. I went to look them up in Poker Tracker and noticed that not only had I played each of them in three SNGs before, it was the same three ie they always play together. Should this concern me? I have a friend who I have played a ton of SNGs with so someone could think the same of us, but then again we chat a ton during games too so everyone knows we know each other, whereas these guys were stone silent through all three games. In one they ended the SNG heads up against each other and it lasted three hands (although I don't have a record of those hands so who knows what was going on.) I thought about pointing them out to Paradise support and didn't, but I did end up leaving the table and picking another one. How would you guys feel about this situation?