I am sure if their projects are real and have offices in their country and we can visit to make sure that they are right there. But most are not and they use a fake team photo to manipulate investors into interest and blur.
It is difficult but yes we must be clever in reading such conditions such as reading the Roadmap, whitepaper, team, social media, etc.
Even ICO campaigns have Office, We should not trust them immediately. Many ICO campaigns last year had a similar fraud strategy.
What they do is they are looking for a Country Ambassador to rent an office for their ICO campaign to make their company look more credible. And once they collect huge sums of money into their ICO they will disappear like bubbles and the angry investors will focus on the country ambassador who just wants to earn money for promoting scam ICO campaign.