Actually, the incremental inconvenience will be minor. After the bombings in London, the users brought all the available cell phone and wired phone systems down simply by volume of traffic.
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You can always strike out the offending clause and initial the strikeout. The other party then has the option of accepting this, or not, as they choose. (They always make you sign first, I have noticed).
In any case such clauses were ruled unlawful in UK courts years ago as they prevent you using your skills.
It teaches good habits (but with the demise of Turbo Pascal I am unable to suggest a worthy compiler).
I was taught Fortran originally and now spend my time working in C on embedded processors, which shows the futility of trying to teach a 'useful' language. Several other languages and assemblers have also passed through my brain in the intervening forty years or so, including Basic, but I still think that Pascal is the only suitable pedagogical language.