In the Haunt actors do not "touch or grab" you. But our show is aggressive and they do get close. Some animations, moving walls, props and puppets will touch you. Props actors have may contact you.
In the Lot one of the most common things is actors posing for photos with patrons. This often causes contact to begin... An example - If I was acting in the lot and I had a a chain I might drape it around a guests neck for the photo. Once the photo is taken I am standing there with a chain wrapped around someones neck... Interesting situation!
Sometimes long fingers or costuming might be used to lightly brush guests - The trick is knowing what is acceptable and what is appropriate. Hard to read guests inside the haunt, easier to work with them in the lot.
We do not make touching people an active element or something to market with, but contact of some sort can occur usually only outside, usually only with experienced actors and within certain guidelines.
Long ago our signs read "Don't Touch the Actors and they won't touch you." Now for many years they have read "Don't Touch the Actors".
Short answer to a complex question - but since I have a giant puppet hand inside that tries to grab you - I guess you might be touched... but 18 year old kids grabbing you in the dark? Nope.