For the vast majority of mob types, FFXIV stays true to their original encounter forms.
Flytraps agro. Every flytrap you've seen since you were level 6 has agroed. They will always agro. If you don't know, ask. We know. I don't know how you managed to not know, but we know.

Don't cry if they agro. Its YOUR fault if one agroes you. No one else's.