Does this send out alarm bells or is it me being paranoid

Five day ago I turned 18 so now everybody has access to my PM’s which is ok. But I have been getting lots of massages from guys who I don’t know me send me massages with “hi gorgeous or sweetheart” with these emojis 🥰 😉 💕 and even present. Is it normal to feel a bit uncomfortable with these guys or am I just being a snob. When I get massages from strangers that just say “hi how are you” I usually reply and ask how they are if I have time 🤷‍♀️