Daphne and Velma's regular costumes include mini skirts.

Fred and Daphne both have a crush on each other

There are some comedic violence.

None, other than the gang saying their famous catchphrase like "Zoinks", "Jinkies", and "Jeepers".

In the episode What A Night For A Fright there are barrels of wine hidden in the basement that Scooby and the gang later discover while searching for 2 green ghosts with chains.

There are a lot of scenes where monsters chase the gang around

In every episode, the gang explores a spooky environment

Some monsters may be frighting to children.