The Travel Tips feature is still experimental. It will take a couple of weeks for us to set some well-defined rules. Meanwhile, all members are encouraged to post whatever they can come up with or remember from their journeys. There is no need to self-censor.
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The Red/Green signal are sufficient to indicate your approval/disapproval. If some types tips are irritating you, further filters will soon be introduced, based on your likes. For example, members will be able to filter out sightseeing tips (if they so wish).
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Meanwhile, all members are requested NOT to discourage or demoralize others. Please bear with it for now. Thanks.