It's really not that serious a topic but here's a serious answer anyway: you can have full stops anywhere you want, it's really up to the reader to not read int

It's really not that serious a topic but here's a serious answer anyway: you can have full stops anywhere you want, it's really up to the reader to not read into what you've written. Not everyone uses full stops that way and it mostly applies to chat anyway. I use full stops at the end of HN comments, but not at the end of instant messengers or chat rooms for example.