could you suggest some embarrassing dares?

Dare them to emulate 2 girls 1 cup

Dare them to chat on cam with someone and then take off an article of clothing everything the other person says "lol" >:)

Ask some passerby if they might like going to the dentist barefoot.

Ask the cashier whether you smell like you didn't shower.

Find an old, old lady and ask if she wears dentures.

Ask a random person in the street to kiss you

I don't know if this would help but why don't you ask that guy to shout outside any house where a teenage daughter lives and then, confess "love", and shout unless their dad come out and thrash them?

tell them to walk up to a dustbin on the street and pretend to have sex with it.

Tell them to lick somones feet for a minute.

Tell them to dress in a bra, go outside and walk around the block once.

Have someone call a teacher of theirs and confess "love".

Strip nekked and run up and down your street.

to kiss the person next to them, or ask them who there best lover was

That's not nice girlie.