Yeah, we say lol to each other as a joke when something is "funny" or as a joke in it self, but never as a response to someone outside the family circle or in formal setting. Bot that may change too in the future.

The internet is for sure speeding things up. I wonder how will our (Czech) language look like in 10, 20, 30 years. I am all for simplification but sometimes it just feels weird :D