Don't use a power strip as a long extension cord.

No. Power strips are designed for short reach — six feet or so — and have built-in circuit breakers for moderate loads. Extension cords are made for longer distances and often use heavier-gauge wire to handle voltage drop and prevent overheating. Run a power strip across the room and you risk a fire. Run an extension cord across the room and plug your stuff into that instead. That’s the safe, cheap fix.