If you are using sites like Spokeo to look up coworkers or neighbors, then yes, it's probably not an activity you want to engage in. If you are using it to look at library inventory, old newspapers, or to find scholarly journals, then it's completely fine.
At the end of the day, searching on the Deep Web should be done cautiously. Some Deep Web search engines discussed here are perfectly okay to explore, but once you get into the Tor world, your online guard should be up.
It’s very easy to click on something and go down a rabbit hole of the Internet you probably don’t want to visit. We do not recommend venturing into prohibited, unethical sites on the Dark Web. When you find nasty content, just close all the windows, and Tor will erase your records. If you're worried about the searches you've done on Google, learn how to delete your Google search history.