text: Another disadvantage of using a proxy server is that the server’s host can see exactly what you’re doing online. In theory, they could even log this information, potentially causing you all sorts of trouble. That’s why, if you’re intent on using a proxy server, you should pick one which is under control of someone you really trust. More often than not, you won’t know the owner’s identity, which makes this hard to do. He or she could be collecting your data or even injecting ads into the pages you visit for all you know. In short, a proxy server doesn’t offer you the level of privacy and security as other solutions.