You can message without a phone number. You can lock the app, hide chats, and put files in a vault. You can block and report. You can delete the account. Friend chats and group messages are free, and paid actions show a price first.
Random chat on the website is text only, asks you to confirm that you are 18, and stays out of search results while a conversation is open. The public guides and the city pages are the pages meant for search.