And as far as plants go has their been internet chatter about that in the past?
No. They've done that before. I remember getting this far (and I think even farther) before finding out about some of the 'contestants'.
As far as plants... yeah, that's been floated for quite a while now.
It doesn't seem plausible that some of the wingnuts they've had on are either
a) That nuts in real life. or;
b) Kept around without incentive. "Listen, you've got 12 girls/guys to choose from. You know you want one of those 3, so just keep X around for awhile longer, okay?
I don't know about Internet chatter, as I only read our threads here, which are always SPOILER FREE. Reading any thing out there, unless one of us linked to it and checked the
whole page ahead of time that it is spoiler free, may mean reading a nasty surprise. But, here, yes, WE have thought many gals have been plants.
The few that I can recall are:
Michelle Money
Vampire girl (I don't know her real name. She actually left the show of her own accord when she realized some people were really into the competition seriously to find a mate.

)
Courtney - the model, who was brought on just to stir up trouble and WIN. Only, the Bachelor, Ben, decided he wanted her after they went skanky dipping in the FL ocean.

Yep, she WON alright. Ben had been played.
Blakeley, the VIP cocktail waitress
Of the men:
Bentley, from Ashley's season
Kalon, who helicoptered in when all the other guys came in limos, and claimed he was a Luxury Brand Consultant, which probably meant he worked for a "luxury car" company. (Emily's season.)