For those who are concerned about the ethics of attaching particles to hats/miscs, I've attached a modified version below:
Changes:
1. Removed hats/misc section (ineffective anyways).
2. Removed class/slot selection (ineffective anyways).
3. Suppressed menu popup after particle application and removal.
4. Cleaned up phrases and made particle effects more recognizable.
5. Changed the command trigger from !unusual to !particle.
6. CVAR flag changed to particle_immunity (def: 0). Accepted flags: a, b, o, p, q, r, s, t or z. 0 = don't need flag
Please check whether I did the menus right. Also remove this post if it violates any Valve policies.