Why would you need a script for sticky spam? Just hold m2 and tap m1 repeatedly, I dont see how a script could make that more practical
Anyway, since you're European, here's what the etf2l rules say
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6.3 Scripts
Scripts that allow a player to perform an action in-game that he would not be able to execute without the script, or scripts that purposefully disrupt the player hitbox are banned. Scripts that freeze or glitch the player model (e.g. in mid-air to be less predictable) to make it harder to hit are also banned.
Usage of banned scripts will be penalized on a case-by-case basis, depending on the intent of the script, the impact on the matches the script. Possible penalties may include warnings, default losses for one or more match rounds and league bans for repeated offenses.
Examples of banned scripts:
Chargeturn script (this includes the use of other peripherals to achieve sharper turn angles)
Examples of allowed scripts:
Duck jump script
Null-cancelling movement script
Rocket jump script
Mask uber script
Team say scripts
If you are unsure about the legality of a particular script, please contact an admin to clarify the situation before using the script in an official match.
"Scripts that allow a player to perform an action in-game that he would not be able to execute without the script (...) are banned".
Seeing as you can already sticky spam without a script, it doesn't sound like using one would be bannable. But as the rules say, if you aren't sure, just ask an ETF2L admin
EDIT: Because I'm a god at procrastinating important shit in my life, I looked at both the UGC and ESEA rules and they pretty much say the same thing
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UGC - 7.4 Using the server or console commands to give any part of your team an unfair advantage is cheating. This does not include scripts regarding flag status, class status, health status, incoming calls, or the like. If you are in doubt about a particular script, post it on our forum for advance approval by an admin.
ESEA - Scripts - All scripts that alter a player's hit box, or give a player an unfair advantage over others are illegal