Possible Clues:

• 'As I understand it,' online
• Disclaimer letters before a message board comment
• Texter's 'Just a thought ... '
• Forum disclaimer
• Initialism whose third initial often isn't true
• Online "Just saying"
• Chat room qualifier
• Texter's 'As I see it ...'
• Texter's "Just a thought ... "
• Blogger's "That's what I think"