Pretty much all of my horsey friends have ridden my horses, and I've ridden theirs as well. I've let beginers ride my mare and gelding. Kids have gotten on my mare and walked her out for me (helmet included). I usually stick a hack on my mare when I put a beginer on her, and just tell them to keep their hands low by her neck. Patty(mare) and Brady(gelding) both neck rein, and Brady is a big babysitter. Even Patty turns into a babysitter with other riders. Now I won't let people run Patty through the barrels, I have some but it's not a common thing. Brady on the other hand, I plan to give lessons on him he's an old very finished horse that would take alot to ever ruin. My colt, Eightysix, is a bit different. He's only 3, It's either me or my mom on him, or once my boyfriend whose ridden his whole life. Not that I don't trust him, he's pretty laid back and broke, he's just my colt and not everyone can ride a colt without creating bad habits.
Just my thoughts on the matter. I like knowing that anyone can ride and handle my horses, and if I ever decide to sell one I have that knowledge. So what are your opinions?