Ignore it. Don't take it personally. I just don't want to make friends online at this point. Got burnt a few times. And just a Hi is no incentive for me to reply. A corny opening line won't help either. I get too many of those, so your message does not stand out. If you actually want to interact with me, be consistent about following my posts. Comment on those. That's how I get familiar with you. Then, if you inbox me personally, I might respond.

reply with a hi back. maybe inquire as to why u chose that particular profile pic.

i'd say Henloo

Sorry, ignore the message

Get creeped out apparently.

I'll be happy to reply back

I wouldn't respond

Send hi back

Say, Hello!

Send two dozen pictures of my shlong