Mostly this question (and some earlier knowledge about food & drink behaviour in space) made me think that which are those foods that would mean a serious threat for people in space?

My two ideas are: foods that make a lot of crumbs (like chips) since those are floating in air and it may enter to the lungs of people. And drink, with the same reason with drops.

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    $\begingroup$ Zoltan: the most dangerous thing is booze. You can't take risks DUI at 17100 miles per hour. $\endgroup$ – Deer Hunter Aug 13 '13 at 15:39
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    $\begingroup$ Okay, @DeerHunter, it was the second funniest thing I've ever seen in a SE site. Thanks :'D $\endgroup$ – Zoltán Schmidt Aug 13 '13 at 15:52
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    $\begingroup$ This question isn't a good fit for the sort of site we are going for here. There's a lot of wiggle room in your definitions, so I can imagine lot's of people throwing in their 2 cents. Perhaps a more specific question would help: "What are the dangers of eating chips in space?" If you edit this question, we can see about opening it back up to answers. $\endgroup$ – Jon Ericson Aug 13 '13 at 20:35
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    $\begingroup$ Just so you're all up to date in case you missed it, @Undo has created a new discussion in our meta: Is the 'microgravity food safety' question on-topic?. ;) $\endgroup$ – TildalWave Aug 13 '13 at 21:19
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    $\begingroup$ @JonEricson I do not see the point in editing it. The current version is a good place to start - as good as it can get without some background in this field. If you have never seen e.g. a NASA guideline document in your life, you just can not imagine its complexity or way of thinking. So altering the question does not help. A good answer has to start here and work its way up into the high ground. 'There are no stupid questions, just stupid answers.' Please take care of the latter and people's two cents instead ... $\endgroup$ – s-m-e Aug 15 '13 at 17:11