Fear is such a powerful trap.
And a lonely one.
As a personal isolation box, it may not feel so lonely when you (general "you") can anonymously swap confessions of your fears and neuroses with other, similarly trapped individuals within a "True Confessions" or "Things You're Ashamed to Admit" thread on a message board [kind of like pushing contraband notes through the bars of a prison cell, or tapping messages on the dividing wall]. But, fear still keeps you manacled and shackled in the real world.
Advice to the OP: if you've read the threads (mentioned above), ask yourself whether it would be wise to synchronize your behavior with such influences. [I mean no disrespect to posters who contributed to those threads; but, the feelings and attitudes expressed therein were often shockingly outside of a healthy norm.]
It is quite possible to appreciate the janitor's gesture for what it appeared to be, and investigate him and his intent with a self-protecting approach - if you are interested.
Why unnecessarily subsume joy and wonder to the paralyzing lockdown of fear?