It is not ‘bad’ so much as it is risky. You risk dropping the spider or losing the spider if they get away from you. I have discussed this topic before, and given my personal opinion. The tarantula owner has to review both sides of the argument, and make up their own mind. I have never advocated that people absolutely should handle their tarantulas, and I have been very firm in telling people there is no good reason to hold a tarantula. It all comes down to personal preference.Either way, whether or not I handle my tarantulas is my own business. That’s all I’m going to say on the matter.