Why do people hesitate about merging Free Companies?

[GameGeeks]

For me, small close knit groups tend to have less drama, and much more fun and create closer friendships with just a few.
Larger FC's, more drama, people don't talk, no bonds formed.

To be fair, there's a chance a large FC group could be using voice chat. Not hard to forget about the text chat using that. Would explain no talking.