Technically, it is possible, but you have to force that on all of your nodes (and it wouldn't work for other LN nodes). You can always deposit some coins to some 2-of-2 multisig address and never generate channel closing transaction. But, the consequences are, that nobody will be able to touch that coins alone, then both parties have to be online and agree on channel closing to do that. In case of peers that don't trust each other it is unacceptable, but if you really want that feature, you can technically get it, if you want to disable uncooperative channel close.