There's a lot more to this picture than what's being told. I have reported players for obscenities in channels. For reference I'm talking racial slurs and other derogatory speech about specific groups of people. If they're talking about sexual things like various anatomy being inserted into various other anatomy and so on and so forth. Considering a good portion of FFXIV is probably people in their later teens and early twenties when humans are a little more hormonal. That isn't anything punishable.

Now if it was derogatory or racial you should have quoted that to the GM or be more direct about the nature of the obscenities being spoken.

Until these questions are further laid out, the GM did his job to a T.