Popular scams:-
Sorry I got you banned- Can you rate this workshop item?- Do you want to join TF2 tournament?- Can you try this game?
Tips:
- If you have your password saved on your browser, then Steam should autofill if each time. If it doesn't autofill it, then it's a website pretending to be Steam- ALWAYS be in doubt. If someone is messaging you out of nowhere because they want your help, they probably just want to scam you. Especially if it's not someone you know really well.