Which of the following actions must teams avoid according to the rules?

Teams must avoid causing delays to the start of the MATCH. This rule is in place to promote fairness and efficiency within the competition. Delays can disrupt the schedule, affect other teams’ preparation, and lead to a disorganized event environment. Ensuring timely starts helps maintain the flow of matches and allows all teams to compete under the same conditions without unnecessary interruptions.

The other actions listed do not directly impact the integrity of the competition in the same way that causing delays does. While expecting improvements through others' difficulties might not be the sportsmanlike attitude desired in the competition, it doesn't inherently disrupt the flow of the matches. Bringing personal tools to the ARENA can introduce safety concerns or unfair advantages but may not be explicitly outlined in this context as a rule to avoid. Participating in multiple ROBOT registrations can lead to confusion and misrepresentation but does not directly affect the timing of the matches. Thus, the emphasis on avoiding delays is critical for maintaining the structure and fairness of the competition.