I had one person send "hi" to me. I ignored it hoping they'd send the question eventually without me saying "hi" back. After 30 mins they sent "hi" again... I

I had one person send "hi" to me. I ignored it hoping they'd send the question eventually without me saying "hi" back. After 30 mins they sent "hi" again... I think from now on I'm just going to ignore it from the people who do it all the time. They won't get a response unless they actually tell me what they want.