Grindr has an interesting approach to personal safety, including a "Sexual Health" section in each profile. This unique (optional) section lets you disclose your current HIV status and when you were last tested.
It's fairly likely that you'll encounter fake accounts on here at some point. Fortunately, a quick review of their profile (usually) will reveal if an account is fake. One easy way to spot a fake account is by looking at their height, which will be listed as "under three feet." You can also tell whether they are scammers if you message them. The responses, being fully automated, will quickly fall out of context, revealing them as a bot. If they send you a link, do not click it. This tactic will often install a bug on your device, which could potentially steal valuable personal information.