I figured that I’ve been made a wrong decision. I state this based on the following arguments:
a) Innocence presumption was not taken in consideration. Rules are rather quite hard to be found in Site-feedback. I’ll ask our admins to make a distinct forum so that the rules should be found (and read) very easily. Flash was at his 10th post at that time.
b) Each user have the right to be informal warned several times prior to be formal warned here.
c) Flash was very cooperative. On Clauss’s advice he edit his post. Shortly later he also not shrinked (as my request) but changed his avatar.
Conclussion: My warning will be not honoured.
Flash, please accept my apologies for the inconvenience caused.