Defrosting is a major part of the freezetag mod and an essential part of ensuring your teams success for the round.
Players who decide that they only want to kill and not be a team player by helping out your team mates and actively defrosting will be warned a couple of times to participate before being kicked from the server.
This is just how it is. It's not about your game style, we have plenty of snipers who also actively defrost. You get more points for a defrost than a kill. This highlights the importance of defrosting. People can and have won maps with no kills whatsoever.
The ones who play for themselves more than the team usually are the last to get frozen, then they have to break their cover anyway to try and defrost someone, then get killed in the process and the team losses the round. If the player had broken cover earlier to defrost it could have had an opposite effect on how the round played out.
We encourage players to play the mods we have on offer as they were designed to be played and players not following this ideal are not being team players and will be warned.
It's never personal or about your game style, it's about playing the mod properly.
Hope this clarifies it for you.